CN113930160A - Graphene-loaded silver ion diatom ooze antibacterial coating and preparation method thereof - Google Patents
Graphene-loaded silver ion diatom ooze antibacterial coating and preparation method thereof Download PDFInfo
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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Abstract
A graphene-loaded silver ion diatom ooze antibacterial coating and a preparation method thereof relate to an antibacterial coating and a preparation method thereof. The invention aims to solve the problem that nano silver ions are easily oxidized in the air to lose antibacterial and antiviral activities due to poor loading effect of nano silver in the existing graphene nano silver dispersion liquid. The antibacterial coating comprises graphene-loaded silver ion diatomite powder, a defoaming agent, a thickening agent, a dispersing agent, water, an aqueous resin dispersion, a film-forming assistant and a pH regulator; the preparation method comprises the following steps: firstly, preparing graphene-loaded silver ion diatomite powder; secondly, weighing the materials; thirdly, primary mixing; fourthly, mixing; and fifthly, final mixing to obtain the graphene-loaded silver ion diatom ooze antibacterial coating. The advantages are that: the nano silver ions can be firmly loaded on the graphene, so that the effective service life of the nano silver ions for resisting bacteria and viruses is prolonged, and formaldehyde can be purified and negative oxygen ions can be released. The preparation method is mainly used for preparing the graphene-loaded silver ion diatom ooze antibacterial coating.
Description
Technical Field
The invention relates to an antibacterial coating and a preparation method thereof.
Background
The nano silver ion has antibacterial and antiviral activity, and is Ag+At very low concentration, the bacterial cell membrane can be destroyed or the sulfhydryl of enzyme protein in the bacterial body can be strongly absorbed and rapidly combined together, and the reduction of the original organismThe activity of active enzyme destroys active cells of cell synthetase, which die due to the loss of division and proliferation ability, and the nano silver can also destroy a microorganism electron transmission system, a respiratory system and a substance transmission system, and the anti-coronavirus rate of the nano silver ion solution with the concentration of 30ppm to coronavirus HcoV-229E strain is more than 99.99 percent in the prior detection; however, nano silver ions are easily oxidized in the air and lose antibacterial and antiviral activities. The graphene two-dimensional lamellar structure can penetrate bacterial cell membranes, kill bacteria and achieve an antibacterial effect. And the large specific surface area of the graphene can increase the contact area of the antibacterial agent and bacteria, so that the antibacterial rate is improved, and the efficient and lasting antibacterial effect is achieved. Therefore, graphene and nano-silver are prepared into graphene nano-silver dispersion liquid at present and used as an antibacterial aid. However, the nano silver in the graphene nano silver dispersion liquid has poor loading effect, so that nano silver ions are easily oxidized in the air and lose antibacterial and antiviral activities.
Disclosure of Invention
The invention aims to solve the problem that nano silver ions are easily oxidized in the air and lose antibacterial and antiviral activities due to poor nano silver loading effect in the existing graphene nano silver dispersion liquid, and provides a graphene silver ion-loaded diatom ooze antibacterial coating and a preparation method thereof.
The graphene-loaded silver ion diatom ooze antibacterial coating comprises, by weight, 100-140 parts of graphene-loaded silver ion diatom ooze powder, 1.6-2.4 parts of an antifoaming agent, 2.5-3.5 parts of a thickening agent, 4-6 parts of a dispersing agent, 100-140 parts of water, 800-1200 parts of an aqueous resin dispersion, 35-45 parts of a film forming aid and 0.8-1.2 parts of a pH regulator; the solid content in the aqueous resin dispersion is 35-45%; the content of graphene in the antibacterial paint of the silver ion-loaded diatom ooze is (40-70) g/10kg, and the content of silver ions in the antibacterial paint of the silver ion-loaded diatom ooze is (4-7) g/10 kg.
The preparation method of the graphene-loaded silver ion diatom ooze antibacterial coating comprises the following steps:
firstly, preparing graphene-loaded silver ion diatomite powder:
firstly, mixing a water-soluble graphene solution and a nano silver ion solution for 6-10 hours by ultrasonic-assisted stirring to obtain a graphene-loaded silver ion mixture; the concentration of graphene in the water-soluble graphene solution is 1.5 g/L-8 g/L; the concentration of silver ions in the nano silver ion solution is 500ppm to 3000 ppm;
adding nano titanium dioxide, superfine calcium stearate, superfine talcum powder, superfine diatomite, nano tourmaline powder and copper-doped titanium dioxide powder into the graphene-loaded silver ion mixture, stirring and mixing uniformly, and then sieving and drying to obtain graphene-loaded silver ion diatomite powder; the mass fraction of graphene in the graphene-loaded silver ion diatomite powder is 2-8%, the mass fraction of silver ions is 0.2-0.8%, the mass fraction of nano titanium dioxide is 25-35%, the mass fraction of superfine calcium stearate is 5-15%, the mass fraction of superfine talcum powder is 5-15%, the mass fraction of superfine diatomite is 10-20%, the mass fraction of nano tourmaline powder is 15-25%, and the mass fraction of copper-doped titanium dioxide powder is 20-30%;
secondly, weighing materials: weighing 100-140 parts of graphene-loaded silver ion diatomite powder, 1.6-2.4 parts of a defoaming agent, 2.5-3.5 parts of a thickening agent, 4-6 parts of a dispersing agent, 100-140 parts of water, 800-1200 parts of an aqueous resin dispersion, 35-45 parts of a film forming additive and 0.8-1.2 parts of a pH regulator in parts by weight; the defoaming agent is divided into two parts; the solid content in the aqueous resin dispersion is 35-45%;
third, primary mixing: stirring, dispersing and uniformly mixing one part of the defoaming agent, the thickening agent, the dispersing agent and the water weighed in the step two by using a stirrer to obtain a primary mixture;
fourthly, mixing: adding the graphene-loaded silver ion diatomite powder weighed in the step two into the primary mixture obtained in the step three, and uniformly stirring to obtain a medium mixture;
fifthly, final mixing: adding one part of the defoaming agent, the aqueous resin dispersion, the film forming aid and the pH regulator into the mixture weighed in the second step, and uniformly stirring to obtain the graphene-loaded silver ion diatom ooze antibacterial coating; the content of graphene in the antibacterial paint of the silver ion-loaded diatom ooze is (40-70) g/10kg, and the content of silver ions in the antibacterial paint of the silver ion-loaded diatom ooze is (4-7) g/10 kg.
The invention has the advantages that:
according to the invention, a water-soluble graphene solution and a nano silver ion solution are used as raw materials, and are fully stirred and mixed under the assistance of ultrasound, so that nano silver ions can be firmly loaded on graphene, and the problem of poor loading effect of nano silver in the existing graphene nano silver dispersion solution is solved, therefore, the effective service life of the nano silver ions in the graphene-loaded silver ion diatom ooze antibacterial coating can be prolonged;
superfine diatomite is added into the graphene-loaded silver ion diatom ooze antibacterial coating, and the diatomite has strong adsorption capacity, so that bacteria and viruses can be in contact with nano silver ions, and the nano silver ions can fully play roles in antibacterial and antiviral activities, so that the graphene-loaded silver ion diatom ooze antibacterial coating has high purification capacity;
thirdly, a water-soluble graphene solution is selected as a raw material, the graphene in the water-soluble graphene solution is 1-20 layers of graphene, the minimum particle size of bacteria is about 0.2mm and about 600 times of that of single-layer graphene, and therefore the bacteria are cut through cell walls and die when moving on a sharp nanoscale two-dimensional material such as graphene; the graphene can directly extract phospholipid molecules on cell membranes on a large scale to destroy the cell membranes so as to kill bacteria;
fourthly, copper-doped titanium dioxide powder is added into the graphene-loaded silver ion diatom ooze antibacterial coating, and the copper-doped titanium dioxide is used as a photocatalyst, so that the graphene-loaded silver ion diatom ooze antibacterial coating has a formaldehyde purification capacity;
the nano tourmaline powder is added into the graphene-loaded silver ion diatom ooze antibacterial coating, so that the graphene-loaded silver ion diatom ooze antibacterial coating can release negative oxygen ions and has the effects of sterilizing, removing peculiar smell and decomposing harmful chemical substances, and the nano tourmaline powder and the copper-doped titanium dioxide powder are used in combination, so that the formaldehyde purifying capacity of the graphene-loaded silver ion diatom ooze antibacterial coating can be improved;
sixthly, the graphene-loaded silver ion diatom ooze antibacterial coating has a very strong killing effect on bacteria (typhoid bacteria, staphylococcus aureus, pseudomonas aeruginosa, pneumonia bacillus or escherichia coli), fungi (various molds, ringworm or candida albicans) and disease users (influenza, measles, hepatitis viruses or coronavirus).
The graphene silver ion-loaded diatom ooze antibacterial coating is suitable for painting and decorating indoor walls of homes, villas, apartments, hotels, schools, hospitals, government office institutions and various public places, has a remarkable effect of killing bacteria and viruses attached to the wall surface to achieve an indoor environment epidemic prevention effect, and can purify formaldehyde and release negative oxygen ions.
Detailed Description
The first embodiment is as follows: the graphene silver ion-loaded diatom ooze antibacterial coating comprises, by weight, 100-140 parts of graphene silver ion-loaded diatom ooze powder, 1.6-2.4 parts of an antifoaming agent, 2.5-3.5 parts of a thickening agent, 4-6 parts of a dispersing agent, 100-140 parts of water, 800-1200 parts of an aqueous resin dispersion, 35-45 parts of a film forming aid and 0.8-1.2 parts of a pH regulator; the solid content in the aqueous resin dispersion is 35-45%; the content of graphene in the antibacterial paint of the silver ion-loaded diatom ooze is (40-70) g/10kg, and the content of silver ions in the antibacterial paint of the silver ion-loaded diatom ooze is (4-7) g/10 kg.
The second embodiment is as follows: the present embodiment differs from the first embodiment in that: the graphene-supported silver ion diatomite powder is prepared from a water-soluble graphene solution, a nano silver ion solution, nano titanium dioxide, superfine calcium stearate, superfine talcum powder, superfine diatomite, nano tourmaline powder and copper-doped titanium dioxide powder; the mass fraction of graphene in the graphene-loaded silver ion diatomite powder is 2-8%, the mass fraction of silver ions is 0.2-0.8%, the mass fraction of nano titanium dioxide is 25-35%, the mass fraction of superfine calcium stearate is 5-15%, the mass fraction of superfine talcum powder is 5-15%, the mass fraction of superfine diatomite is 10-20%, the mass fraction of nano tourmaline powder is 15-25%, and the mass fraction of copper-doped titanium dioxide powder is 20-30%. The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment is different from the second embodiment in that: the graphene in the water-soluble graphene solution is 1-20 layers of graphene. The rest is the same as the second embodiment.
The fourth concrete implementation mode: the present embodiment differs from the second or third embodiment in that: the particle size of the nano titanium dioxide is 50-400 nm, the particle size of the superfine calcium stearate is less than 10 microns, the particle size of the superfine talcum powder is less than 50 microns, the particle size of the superfine diatomite is less than 50 microns, the particle size of the nano tourmaline powder is 10-800 nm, and the particle size of the copper-doped titanium dioxide powder is less than 50 microns. The other embodiments are the same as the second or third embodiment.
The fifth concrete implementation mode: the embodiment is a preparation method of a graphene-loaded silver ion diatom ooze antibacterial coating, which is specifically completed according to the following steps:
firstly, preparing graphene-loaded silver ion diatomite powder:
firstly, mixing a water-soluble graphene solution and a nano silver ion solution for 6-10 hours by ultrasonic-assisted stirring to obtain a graphene-loaded silver ion mixture; the concentration of graphene in the water-soluble graphene solution is 1.5 g/L-8 g/L; the concentration of silver ions in the nano silver ion solution is 500ppm to 3000 ppm;
adding nano titanium dioxide, superfine calcium stearate, superfine talcum powder, superfine diatomite, nano tourmaline powder and copper-doped titanium dioxide powder into the graphene-loaded silver ion mixture, stirring and mixing uniformly, and then sieving and drying to obtain graphene-loaded silver ion diatomite powder; the mass fraction of graphene in the graphene-loaded silver ion diatomite powder is 2-8%, the mass fraction of silver ions is 0.2-0.8%, the mass fraction of nano titanium dioxide is 25-35%, the mass fraction of superfine calcium stearate is 5-15%, the mass fraction of superfine talcum powder is 5-15%, the mass fraction of superfine diatomite is 10-20%, the mass fraction of nano tourmaline powder is 15-25%, and the mass fraction of copper-doped titanium dioxide powder is 20-30%;
secondly, weighing materials: weighing 100-140 parts of graphene-loaded silver ion diatomite powder, 1.6-2.4 parts of a defoaming agent, 2.5-3.5 parts of a thickening agent, 4-6 parts of a dispersing agent, 100-140 parts of water, 800-1200 parts of an aqueous resin dispersion, 35-45 parts of a film forming additive and 0.8-1.2 parts of a pH regulator in parts by weight; the defoaming agent is divided into two parts; the solid content in the aqueous resin dispersion is 35-45%;
third, primary mixing: stirring, dispersing and uniformly mixing one part of the defoaming agent, the thickening agent, the dispersing agent and the water weighed in the step two by using a stirrer to obtain a primary mixture;
fourthly, mixing: adding the graphene-loaded silver ion diatomite powder weighed in the step two into the primary mixture obtained in the step three, and uniformly stirring to obtain a medium mixture;
fifthly, final mixing: adding one part of the defoaming agent, the aqueous resin dispersion, the film forming aid and the pH regulator into the mixture weighed in the second step, and uniformly stirring to obtain the graphene-loaded silver ion diatom ooze antibacterial coating; the content of graphene in the antibacterial paint of the silver ion-loaded diatom ooze is (40-70) g/10kg, and the content of silver ions in the antibacterial paint of the silver ion-loaded diatom ooze is (4-7) g/10 kg.
The sixth specific implementation mode: the present embodiment is different from the fifth embodiment in that: in the second step, the thickening agent is hydroxymethyl cellulose; the dispersing agent is sodium dodecyl benzene sulfonate; the film-forming auxiliary agent is acrylic resin polyurethane copolymer resin; the defoaming agent is dimethyl siloxane. The rest is the same as the fifth embodiment.
The seventh embodiment: the present embodiment is different from the fifth or sixth embodiment in that: in the third step, the stirring machine is used for stirring and dispersing for 3min to 5min at the stirring speed of 200r/min to 500 r/min. The other is the same as the fifth or sixth embodiment.
The specific implementation mode is eight: the fifth to seventh embodiments are different from the first to seventh embodiments in that: in the fourth step, the mixture is stirred evenly at the stirring speed of 1000r/min to 1500 r/min. The rest is the same as the fifth to seventh embodiments.
The specific implementation method nine: the fifth to eighth differences from the present embodiment are: and step five, stirring for 30-50 min at the stirring speed of 400-600 r/min. The rest is the same as the fifth to eighth embodiments.
The detailed implementation mode is ten: the fifth to ninth embodiments are different from the fifth to ninth embodiments in that: and fifthly, the pH value of the graphene-loaded silver ion diatom ooze antibacterial coating is 7-7.5. The rest is the same as the fifth to ninth embodiments.
The invention is not limited to the above embodiments, and one or a combination of several embodiments may also achieve the object of the invention.
Example 1: the preparation method of the graphene-loaded silver ion diatom ooze antibacterial coating comprises the following steps:
firstly, preparing graphene-loaded silver ion diatomite powder:
firstly, mixing a water-soluble graphene solution and a nano silver ion solution for 8 hours by ultrasonic-assisted stirring to obtain a graphene-loaded silver ion mixture; the concentration of graphene in the water-soluble graphene solution is 5.5 g/L; the concentration of silver ions in the nano silver ion solution is 1500 ppm;
adding nano titanium dioxide, superfine calcium stearate, superfine talcum powder, superfine diatomite, nano tourmaline powder and copper-doped titanium dioxide powder into the graphene-loaded silver ion mixture, stirring and mixing uniformly, and then sieving and drying to obtain graphene-loaded silver ion diatomite powder; the mass fraction of graphene in the graphene-loaded silver ion diatomite powder is 5%, the mass fraction of silver ions is 0.5%, the mass fraction of nano titanium dioxide is 30%, the mass fraction of superfine calcium stearate is 8%, the mass fraction of superfine talcum powder is 7.5%, the mass fraction of superfine diatomite is 11%, the mass fraction of nano tourmaline powder is 16%, and the mass fraction of copper-doped titanium dioxide powder is 22%;
secondly, weighing materials: weighing 100 parts of graphene-loaded silver ion diatomite powder, 2 parts of a defoaming agent, 3 parts of a thickening agent, 5 parts of a dispersing agent, 120 parts of water, 1000 parts of an aqueous resin dispersion, 40 parts of a film forming aid and 1 part of a pH regulator in parts by weight; the defoaming agent is divided into two parts; the solid content in the aqueous resin dispersion was 40%;
third, primary mixing: weighing one part of the defoaming agent, the thickening agent, the dispersing agent and water in the second step, and stirring and dispersing for 5min at the stirring speed of 300r/min by using a stirrer to obtain a primary mixture;
fourthly, mixing: adding the graphene-loaded silver ion diatomite powder weighed in the step two into the primary mixture obtained in the step three, and uniformly stirring at the stirring speed of 1200r/min to obtain a secondary mixture;
fifthly, final mixing: weighing one part of the defoaming agent, the aqueous resin dispersion, the film forming aid and the pH regulator in the second step, adding the weighed mixture into the mixture, and stirring the mixture for 40min at the stirring speed of 500r/min to obtain the graphene-loaded silver ion diatom ooze antibacterial coating; the content of graphene in the antibacterial paint of the graphene-loaded silver ion diatom ooze is 42g/10kg, and the content of silver ions in the antibacterial paint of the graphene-loaded silver ion diatom ooze is 4.1g/10 kg; the pH value of the graphene-loaded silver ion diatom ooze antibacterial coating is 7.2.
In the second step of this embodiment, the thickener is hydroxymethyl cellulose; the dispersing agent is sodium dodecyl benzene sulfonate; the film-forming auxiliary agent is acrylic resin polyurethane copolymer resin; the defoaming agent is dimethyl siloxane.
Example 2: the present embodiment is different from embodiment 1 in that: weighing 110 parts of graphene-loaded silver ion diatomite powder according to parts by weight; the content of graphene in the antibacterial paint of the graphene-loaded silver ion diatom ooze is 48g/10kg, and the content of silver ions in the antibacterial paint of the graphene-loaded silver ion diatom ooze is 4.7g/10 kg; the pH value of the graphene-loaded silver ion diatom ooze antibacterial coating is 7.1. The rest is the same as in example 1.
Example 3: the present embodiment is different from embodiment 1 in that: weighing 120 parts of graphene-loaded silver ion diatomite powder according to parts by weight; the content of graphene in the antibacterial paint of the graphene-loaded silver ion diatom ooze is 56.3g/10kg, and the content of silver ions in the antibacterial paint of the graphene-loaded silver ion diatom ooze is 5.5g/10 kg; the pH value of the graphene-loaded silver ion diatom ooze antibacterial coating is 7.1. The rest is the same as in example 1.
Example 4: the present embodiment is different from embodiment 1 in that: weighing 130 parts of graphene-loaded silver ion diatomite powder according to parts by weight; the content of graphene in the antibacterial paint of the silver ion-loaded graphene diatom ooze is 63.1g/10kg, and the content of silver ions in the antibacterial paint of the silver ion-loaded graphene diatom ooze is 6.1g/10 kg; the pH value of the graphene-loaded silver ion diatom ooze antibacterial coating is 7.1. The rest is the same as in example 1.
Example 5: the present embodiment is different from embodiment 1 in that: weighing 140 parts of graphene-loaded silver ion diatomite powder according to parts by weight; the content of graphene in the antibacterial paint of the silver ion-loaded graphene diatom ooze is 69.6g/10kg, and the content of silver ions in the antibacterial paint of the silver ion-loaded graphene diatom ooze is 6.8g/10 kg; the pH value of the graphene-loaded silver ion diatom ooze antibacterial coating is 7.1. The rest is the same as in example 1.
The main relevant performance detection is carried out according to the national standard of GB/T9756-2009 inner wall paint, the antibacterial performance detection is carried out according to GB/T21866-2008 'antibacterial paint antibacterial (paint film) performance determination method and antibacterial effect', the formaldehyde purification rate test method carries out the test according to the I-type requirements specified by JC/T1074-2008 'indoor air purification function coating material purification function', the negative ion release amount is tested by a test instrument NKMH-103 type air negative ion detector, and the test result is shown in Table 1.
TABLE 1
Claims (10)
1. The graphene-loaded silver ion diatom ooze antibacterial coating is characterized by comprising 100-140 parts by weight of graphene-loaded silver ion diatom ooze powder, 1.6-2.4 parts by weight of a defoaming agent, 2.5-3.5 parts by weight of a thickening agent, 4-6 parts by weight of a dispersing agent, 100-140 parts by weight of water, 800-1200 parts by weight of an aqueous resin dispersion, 35-45 parts by weight of a film forming aid and 0.8-1.2 parts by weight of a pH regulator; the solid content in the aqueous resin dispersion is 35-45%; the content of graphene in the antibacterial paint of the silver ion-loaded diatom ooze is (40-70) g/10kg, and the content of silver ions in the antibacterial paint of the silver ion-loaded diatom ooze is (4-7) g/10 kg.
2. The graphene-supported silver ion diatom ooze antibacterial coating of claim 1, wherein the graphene-supported silver ion diatom ooze powder is made from water-soluble graphene solution, nano silver ion solution, nano titanium dioxide, ultra-fine calcium stearate, ultra-fine talc, ultra-fine diatomaceous earth, nano tourmaline powder and copper-doped titanium dioxide powder; the mass fraction of graphene in the graphene-loaded silver ion diatomite powder is 2-8%, the mass fraction of silver ions is 0.2-0.8%, the mass fraction of nano titanium dioxide is 25-35%, the mass fraction of superfine calcium stearate is 5-15%, the mass fraction of superfine talcum powder is 5-15%, the mass fraction of superfine diatomite is 10-20%, the mass fraction of nano tourmaline powder is 15-25%, and the mass fraction of copper-doped titanium dioxide powder is 20-30%.
3. The graphene-supported silver ion diatom ooze antibacterial coating as claimed in claim 2, wherein graphene in the water-soluble graphene solution is 1-20 layers of graphene.
4. The graphene-supported silver ion diatom ooze antibacterial coating of claim 3, wherein the particle size of the nano titanium dioxide is 50-400 nm, the particle size of the ultrafine calcium stearate is less than 10 μm, the particle size of the ultrafine talc powder is less than 50 μm, the particle size of the ultrafine diatomite is less than 50 μm, the particle size of the nano tourmaline powder is 10-800 nm, and the particle size of the copper-doped titanium dioxide powder is less than 50 μm.
5. The preparation method of the graphene-loaded silver ion diatom ooze antibacterial coating is characterized by comprising the following steps of:
firstly, preparing graphene-loaded silver ion diatomite powder:
firstly, mixing a water-soluble graphene solution and a nano silver ion solution for 6-10 hours by ultrasonic-assisted stirring to obtain a graphene-loaded silver ion mixture; the concentration of graphene in the water-soluble graphene solution is 1.5 g/L-8 g/L; the concentration of silver ions in the nano silver ion solution is 500ppm to 3000 ppm;
adding nano titanium dioxide, superfine calcium stearate, superfine talcum powder, superfine diatomite, nano tourmaline powder and copper-doped titanium dioxide powder into the graphene-loaded silver ion mixture, stirring and mixing uniformly, and then sieving and drying to obtain graphene-loaded silver ion diatomite powder; the mass fraction of graphene in the graphene-loaded silver ion diatomite powder is 2-8%, the mass fraction of silver ions is 0.2-0.8%, the mass fraction of nano titanium dioxide is 25-35%, the mass fraction of superfine calcium stearate is 5-15%, the mass fraction of superfine talcum powder is 5-15%, the mass fraction of superfine diatomite is 10-20%, the mass fraction of nano tourmaline powder is 15-25%, and the mass fraction of copper-doped titanium dioxide powder is 20-30%;
secondly, weighing materials: weighing 100-140 parts of graphene-loaded silver ion diatomite powder, 1.6-2.4 parts of a defoaming agent, 2.5-3.5 parts of a thickening agent, 4-6 parts of a dispersing agent, 100-140 parts of water, 800-1200 parts of an aqueous resin dispersion, 35-45 parts of a film forming additive and 0.8-1.2 parts of a pH regulator in parts by weight; the defoaming agent is divided into two parts; the solid content in the aqueous resin dispersion is 35-45%;
third, primary mixing: stirring, dispersing and uniformly mixing one part of the defoaming agent, the thickening agent, the dispersing agent and the water weighed in the step two by using a stirrer to obtain a primary mixture;
fourthly, mixing: adding the graphene-loaded silver ion diatomite powder weighed in the step two into the primary mixture obtained in the step three, and uniformly stirring to obtain a medium mixture;
fifthly, final mixing: adding one part of the defoaming agent, the aqueous resin dispersion, the film forming aid and the pH regulator into the mixture weighed in the second step, and uniformly stirring to obtain the graphene-loaded silver ion diatom ooze antibacterial coating; the content of graphene in the antibacterial paint of the silver ion-loaded diatom ooze is (40-70) g/10kg, and the content of silver ions in the antibacterial paint of the silver ion-loaded diatom ooze is (4-7) g/10 kg.
6. The preparation method of the antibacterial graphene-supported silver ion diatom ooze coating according to claim 5, wherein in the second step, the thickening agent is hydroxymethyl cellulose; the dispersing agent is sodium dodecyl benzene sulfonate; the film-forming auxiliary agent is acrylic resin polyurethane copolymer resin; the defoaming agent is dimethyl siloxane.
7. The preparation method of the graphene-supported silver ion diatom ooze antibacterial coating according to claim 6, wherein in step three, a stirrer is used for stirring and dispersing for 3-5 min at a stirring speed of 200-500 r/min.
8. The preparation method of the graphene-supported silver ion diatom ooze antibacterial coating according to claim 7, wherein in the fourth step, the mixture is stirred uniformly at a stirring speed of 1000r/min to 1500 r/min.
9. The preparation method of the antibacterial graphene-supported silver ion diatom ooze coating according to claim 8, wherein in the fifth step, the mixture is stirred at a stirring speed of 400r/min to 600r/min for 30min to 50 min.
10. The preparation method of the graphene-supported silver ion diatom ooze antibacterial coating according to claim 9, wherein the pH of the graphene-supported silver ion diatom ooze antibacterial coating in step five is 7-7.5.
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